The experimental model of two-dimensional wedge nozzle with cooling structure was designed

and a series of experimental investigations were conducted to measure the effect of wedge film cooling on infrared signature of the nozzle. The wedge wall temperature

the jet flow temperature on the nozzle exit and the infrared radiation intensity of the nozzle were measured at blowing ratios of 0 to 1. Results show that

with the increase of blowing ratio

the wedge wall temperature gradually decreases and the film cooling effectiveness increases up to 0.68; the jet flow temperature on center area of the nozzle exit decreases to 14%

the infrared radiation intensity of the nozzle gradually decreases to 52.8% at azimuth angle of 0° and 13% at azimuth angle of 90°.